It would have been impossible for any other book to become so generally known among different nations: and indisputably, the fact that modes of thought so diverse from each other have been occupied on the same book, has helped on the human reason more than if every nation had had its own Primer specially for itself. 67 It was also highly necessary that each people for a period should hold this Book as the ne plus ultra of their knowledge. For the youth must consider his Primer as the first of all books, that the impatience to finish this book, may not hurry him on to things for which he has, as yet, laid no basis. 68 And one thing is also of the greatest importance even now. Thou abler spirit, who art fretting and restless over the last page of the Primer, beware! Beware of letting thy weaker fellow scholars mark what thou perceivest afar, or what thou art beginning to see! Until these weaker fellow scholars are up with thee, rather return once more into this Primer, and examine whether that which thou takest only for duplicates of the method, for a blunder in the teaching, is not perhaps something more. 70 Thou hast seen in the childhood of the human race, respecting the doctrine of God's unity, that God makes immediate revelations of mere truths of reason, or has permitted and caused pure truths of reason to be taught, for some time, as truths of immediate revelation, in order to promulgate them the more rapidly, and ground them the more firmly. 71 Thou experiencest in the boyhood of the Race the same thing in reference to the doctrine of the immortality of the soul. It is preached in the better Primer as a Revelation, instead of taught as a result of human reason. 72 As we by this time can dispense with the Old Testament, in reference to the doctrine of the unity of God, and as we are by degrees beginning also to be less dependent on the New Testament, in reference to the immortality of the soul: might there not in this Book also be other truths of the same sort prefigured, mirrored, as it were, which we are to marvel at, as revelations, exactly so long as until the time shall come when reason shall have learned to educe them, out of its other demonstrated truths and bind them up with them? 73